Precision machined from Aircraft Aluminum with a Matte Black Finish; Spring-loaded Posi-lock Push Button Activation automatically deploys sight tower and prevents sight tower from collapsing when deployed; Uses Standard A2 Front Sight Post, interchangeable with other aftermarket posts with equivalent dimensions; Utilizes a single locking Torx Screw with Low Profile Mounting Base and Square-shaped Integral Recoil Stops for a secure zero hold and return to zero on MIL-STD-1913 Picatinny Rails; Designed to match the UTG ACCU-SYNC Spring-loaded AR15 Flip-up Rear Sight (MNT-957)